The thyristor trigger circuit composed of photocoupler

Published:2011/7/5 3:57:00 Author:Lucas | Keyword: thyristor , trigger circuit , photocoupler | From:SeekIC

2-5 (a) is a half-wave circuit. Power supply can provide trigger current for the VSl by resistor R1 and transistor in the PC. The circuit is designed to limit Rl power to be as small as possible, and the current conduction angle controlling range shoule be as large as possible. VDl makes the power consumption of Rl halve, VD2 is used to limit the PC collector transistor cut-off voltage. Figure 2-5 (b) is a full-wave power. Figure 2-5 (c) is the circuit using accumulation of energy capacitor. Figure 2-5 (d) is the wide triggering pulse circuit. Trigger pulse width is lms, which can significantly reduce the power consumption of Rl and capacity of Cl.



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